Always verify the furnace limit switch location and part number against the manufacturer’s parts manual

The center port features an 1/8" MPT (Male Pipe Thread) which uses dryseal taper pipe standards for a secure fit

preventing bypass leakage

and aluminum tubing

Common Questions Is this terminal block a direct drop-in for the Bloomfield 85309

McDonnell & Miller 325400 Head Gasket Always verify the furnace limitThe McDonnell & Miller 325400 Head Gasket (Model 150 14) is a critical component designed specifically for sealing flat flange head units in 150, 93, and 193 Series low water cut offs and pump controllers. Unlike the 150 14H variant, this OEM replacement gasket features a solid design with no mounting holes, ensuring a precise fit for older or specialized flat face flange configurations where a standard 8 hole gasket would fail to provide uniform